Question

determine o valor de x nas proporçoes a)x/3=10/6 b)x/4=91/52 c)x/7=18/21 d)x/105=2/30 e)x/8=36/32 f)x/3=128/48

Answer 1

Utilizando regra de três.

$(a)\frac{x}{3}=\frac{10}{6}\\\\6x=3.10\\6x=30\\x=\frac{30}{6}\\x=5\\\\\\(b)\frac{x}{4}=\frac{91}{52}\\\\52x=91.4\\52x=364\\x=\frac{364}{52}\\x=7\\\\\\(c)\frac{x}{7}=\frac{18}{21}\\\\21x=18.7\\21x=126\\x=\frac{126}{21}\\x=6\\\\\\(d)\frac{x}{105}=\frac{2}{30}\\\\30x=105.2\\30x=210\\x=\frac{210}{30}\\x=7\\\\\\(e)\frac{x}{3}=\frac{128}{48}\\\\48x=128.3\\48x=384\\x=\frac{384}{48}\\x=8$


Espero ter ajudado.
Bons estudos! :)

Answer 2

Resposta:

2 – Determine o valor de x nas proporções:

a) xx

6 = 32

48 b) 1

7 = xx − 6

49 c) 2xx + 1

10 = − 21

30 d) xx − 3

2xx + 1 = 4

5

Explicação passo a passo: